--- product_id: 639025713 title: "Hanna Marine Magnesium Checker® HC HI783" brand: "hanna instruments" price: "€ 337.79" currency: EUR in_stock: true reviews_count: 5 url: https://www.desertcart.gr/products/639025713-hanna-marine-magnesium-checker-hc-hi783 store_origin: GR region: Greece --- # Fast digital readout Color-coded syringes Compact handheld design Hanna Marine Magnesium Checker® HC HI783 **Brand:** hanna instruments **Price:** € 337.79 **Availability:** ✅ In Stock ## Summary > 🌊 Master your marine magnesium with ease and precision! ## Quick Answers - **What is this?** Hanna Marine Magnesium Checker® HC HI783 by hanna instruments - **How much does it cost?** € 337.79 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/639025713-hanna-marine-magnesium-checker-hc-hi783) ## Best For - hanna instruments enthusiasts ## Why This Product - Trusted hanna instruments brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Portable:** Handheld, lightweight design fits perfectly in any marine toolkit. - • **Simplified Testing:** Color-coded syringes reduce errors and speed up your workflow. - • **Effortless Precision:** Digital readout delivers quick, accurate magnesium levels in seconds. - • **Single-Parameter Focus:** Dedicated magnesium measurement ensures specialized accuracy. - • **Marine-Grade Reliability:** Engineered for saltwater aquariums, marine, and aquaculture pros. ## Overview The Hanna Marine Magnesium Checker HC HI783 is a handheld, digital device designed for fast, accurate magnesium testing in saltwater environments. Featuring color-coded syringes and a compact design, it simplifies marine water analysis for aquarists and aquaculture professionals, ensuring optimal coral and invertebrate health. ## Description Our Marine Magnesium Checker HC (HI783) is designed to accurately and quickly determine the magnesium level in marine (saltwater) samples. The digital readout makes measurements effortless. Our Magnesium Checker HC (HI783) is the first marine magnesium test of its kind! This Checker provides an uncomplicated, accurate, and budget-friendly way to measure magnesium in saltwater/marine environments. Color-coded syringes and straightforward testing steps ensure quick and easy measurements every time! Magnesium is vital in saltwater environments as it allows calcium and carbonate to be bioavailable for corals and invertebrates. Designed as a more accurate alternative to chemical test kits, our Marine Magnesium Checker HC (HI783) provides quick, accurate results in a few easy steps. Magnesium Checker Tips & Tricks for Accurate Measurements Measure liquids accurately by syringe by drawing up the plunger until the bottom seal of the plunger is at the desired volume mark. Do NOT raise the liquid to the mark as this will give a false high volume. An air gap between the plunger and liquid is normal. Always use clean, dry cuvettes and syringes/tips. Rinse with deionized (RODI) water only; never rinse with tank water. Dry the cuvettes before use to prevent dilution. Ensure the sample does not contain any debris. Whenever the cuvette is placed into the checker, it must be dry outside and free of fingerprints, oil and dirt. Wipe the cuvette thoroughly with HI731318 microfiber cleaning cloth or a lint-free cloth prior to insertion. Shaking the cuvette can generate bubbles, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette. Do not let the reacted sample stand too long after reagent has been added, as accuracy will be affected. Discard the sample immediately after the readng has been taken or the glass might become permanently stained. Keep the tips with their appropriate syringes during measurement. ## Features - Fewer steps than other chemical tests - Color-coded syringes make the magnesium test simple and effortless - Dedicated to a single parameter - Small size, big convenience - Ideal for: Saltwater Aquariums, Marine, and Aquaculture Applications ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B0B337ZK5N | | Brand Name | Hanna Instruments | | Country Of Origin | USA | | Customer Reviews | 4.3 4.3 out of 5 stars (252) 4.3 out of 5 stars | | Item Form | handheld | | Item Weight | 0.59 Kilograms | | Manufacturer | Hanna Marine Magnesium Checker® HC HI783 | | Number Of Items | 1 | | Pet Type | Fish | | Target Species | Fish | | Unit Count | 1 Count | ## Product Details - **Brand:** Hanna Instruments - **Liquid Volume:** 5 Millilitres - **Item Weight:** 0.59 Kilograms - **Item Form:** handheld - **Target Species:** Fish ## Images ![Hanna Marine Magnesium Checker® HC HI783 - Image 1](https://m.media-amazon.com/images/I/41fpKPdLfKL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Einfach zu bedienen *by on Reviewed in Germany 27 January 2026* Misst was er soll. Einfach in der Handhabung ### ⭐⭐⭐⭐⭐ Actually works very well! *by on Reviewed in Canada 28 April 2024* Love being able to take 5 minutes out of my day to do the test. One tip, set a 30 second timer or the last step and shake vigorously. Then pop into the egg and hold the button till the 3 min counter starts. After 1 min is left open the egg and pull the glass vial out and tilt back n forth to dislodge any bubbles on the glass then pop it back in before the timer ends. That way you'll get a very very close reading if not a perfect reading. This is the new revision and works extremely well.. ### ⭐⭐⭐⭐⭐ Much better results than color chart tests *by on Reviewed in the United States 1 May 2026* Works great and much easier than the color chart tests. The liquid reagent though is very sticky and challenging to clean up if you spill it. I started pouring it into a glass before using the syringe. Not easy to use packaging in that part. ## Frequently Bought Together - Hanna Instruments Hanna Marine Magnesium Checker HC HI783 Saltwater Aquariums, Marine, Aquaculture Applications Magnesium Tester 64 grams - Hanna Instruments High Range Nitrate Checker HI782 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/639025713-hanna-marine-magnesium-checker-hc-hi783](https://www.desertcart.gr/products/639025713-hanna-marine-magnesium-checker-hc-hi783) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-09-19*